1. The problem statement, all variables and given/known data The velocity of a wave of length L in deep water is v = K square root of (L/C + C/L) where K and C are known positive constants. What is the length of the wave that gives the minimum velocity? 2. Relevant equations Possibly a(t) = v'(t) = s"(t) 3. The attempt at a solution I don't know how to work the question but here is my best guess... Can I just cancel L with L and C with C (inside the square root) and be left with v = K. Next, to find the length, can I just find the antiderivative of the velocity, like this: v(t) = Kt + C. How do I workout this question?